I have several email accounts including two gmail accounts - for work. I never get dating or hookup email (spam) on any of them. DH however gets lots. Is this because of the sites he has visited or is it just chance? They seem to come from two or three similar sites. He is not very computer savvy but knows enough to clear browsing history I think and close all apps on iphone. Is it worth checking further or am I paranoid?
Honestly, it depends on which sites he's getting email from. If they're legit dating/hook up sites (like Match, OKCupid, PoF or Adult Friend Finder), then he's used his email address to sign up there, I'm afraid. Seeing as how those are reputable businesses, they're not going to send spam email to people.
If it's spammy type emails, then it's simply because his address is in circulation and has made its way on to spam lists. I've had a gmail account since about the 2nd or 3rd month they were available, and the amount of spam I get is insane (thank god for the automatic filtering...)
Easiest way to figure it out, and this might suck, is to click on whatever link these emails are sending him, which will bring you to the site, and possibly even an account. But I stress - only do this if the emails are from a reputable dating/hookup site, otherwise it's unlikely it's on the up-and-up. So if it's from, for example, Adult Friend Finder, then there's an account there with that email address.
Before my wife and I started dating, we were both on dating sites. Me on Match, she on PoF. Until you deactivate your account, they'll still send you email (matches, etc.) TL : DR - if the emails are from reputable sites, then he has an account there.